KPNA4

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Identifiers
Aliases
External IDsGeneCards: [1]
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

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RefSeq (protein)

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Importin subunit alpha-4 is a protein that in humans is encoded by the KPNA4 gene.[1][2]

Function

The nuclear import of karyophilic proteins is directed by short amino acid sequences termed nuclear localization signals (NLSs). Karyopherins, or importins, are cytoplasmic proteins that recognize NLSs and dock NLS-containing proteins to the nuclear pore complex. The protein encoded by this gene shares the sequence similarity with Xenopus importin-alpha and Saccharomyces cerevisiae Srp1. This protein is found to interact with the NLSs of DNA helicase Q1 and SV40 T antigen.[3]

Interactions

KPNA4 has been shown to interact with RECQL[1] and STAT3.[4]

References

  1. 1.0 1.1 Seki T, Tada S, Katada T, Enomoto T (May 1997). "Cloning of a cDNA encoding a novel importin-alpha homologue, Qip1: discrimination of Qip1 and Rch1 from hSrp1 by their ability to interact with DNA helicase Q1/RecQL". Biochemical and Biophysical Research Communications. 234 (1): 48–53. doi:10.1006/bbrc.1997.6535. PMID 9168958.
  2. Köhler M, Ansieau S, Prehn S, Leutz A, Haller H, Hartmann E (Nov 1997). "Cloning of two novel human importin-alpha subunits and analysis of the expression pattern of the importin-alpha protein family". FEBS Letters. 417 (1): 104–8. doi:10.1016/S0014-5793(97)01265-9. PMID 9395085.
  3. "Entrez Gene: KPNA4 karyopherin alpha 4 (importin alpha 3)".
  4. Liu L, McBride KM, Reich NC (Jun 2005). "STAT3 nuclear import is independent of tyrosine phosphorylation and mediated by importin-alpha3". Proc Natl Acad Sci U S A. 102 (23): 8150–5. doi:10.1073/pnas.0501643102. PMC 1149424. PMID 15919823.

Further reading